On Mon, Jan 18, 2016 at 12:25 PM, Alexander Moisseev
<moiseev AT mezonplus DOT ru> wrote:
> On 18.01.16 19:53, Les Mikesell wrote:
>> Does anyone understand the docs at
>> http://backuppc.sourceforge.net/BackupPC-4.0.0alpha3_doc.html
>> for $Conf{FillCycle} ?   It looks like expiring is really based on
>> 'filled' backups, not necessarily full backups as in v3.  The part I
>> don't get is that it says the most recent backup is always filled
>> whether it is full or incremental.  If the most recent is filled, how
>> would any ever be unfilled?
>>
>
> In v4 full/incremental related to backup transfer only, filled/unfilled 
> related to storage.
>
> Here is a short explanation:
> http://backuppc.sourceforge.net/BackupPC-4.0.0alpha3_doc.html#BackupPC-4.0
>
> "Backups are stored as "reverse deltas" - the most recent backup is always 
> filled and older backups are reconstitued by merging all the deltas starting 
> with the nearest future filled backup and wworking backwards.
>
> This is the opposite of V3 where incrementals are stored as "forward deltas" 
> to a prior backup (typically the last full backup or prior lower-level 
> incremental backup, or the last full in the case of rsync)."
>
>
> So, the latest backup should always be filled, i.e. it actually contains all 
> files.  After the last backup will be taken, files that latest backup 
> contains will be removed from backups between the last backup and previous 
> filled backup recursively. Until the last backup was taken, previous backup 
> was filled, but now it is just "reverse delta".

OK, but then how does that relate to the expiring part - which it says
is really based on the filled status?

--
   Les Mikesell
      lesmikesell AT gmail DOT com

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